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<FONT color="green">001</FONT>    package cheesymock;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.lang.reflect.Field;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.lang.reflect.Method;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.util.Arrays;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.util.regex.Matcher;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.util.regex.Pattern;<a name="line.7"></a>
<FONT color="green">008</FONT>    <a name="line.8"></a>
<FONT color="green">009</FONT>    /**<a name="line.9"></a>
<FONT color="green">010</FONT>     * This class proveds static utility methods for working with methods,<a name="line.10"></a>
<FONT color="green">011</FONT>     * properties and exceptions.<a name="line.11"></a>
<FONT color="green">012</FONT>     *<a name="line.12"></a>
<FONT color="green">013</FONT>     * @author fredrik<a name="line.13"></a>
<FONT color="green">014</FONT>     */<a name="line.14"></a>
<FONT color="green">015</FONT>    public class MethodUtil {<a name="line.15"></a>
<FONT color="green">016</FONT>            private static final Pattern GETTER = Pattern.compile("(is|get)[A-Z].*");<a name="line.16"></a>
<FONT color="green">017</FONT>            private static final Pattern SETTER = Pattern.compile("set[A-Z].*");<a name="line.17"></a>
<FONT color="green">018</FONT>            private static final Pattern PROPERTY = Pattern.compile("(is|get|set)([A-Z].*)");<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>            private MethodUtil() {<a name="line.20"></a>
<FONT color="green">021</FONT>            }<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>            /**<a name="line.23"></a>
<FONT color="green">024</FONT>             * Produces a print-friendly list of argument types.<a name="line.24"></a>
<FONT color="green">025</FONT>             *<a name="line.25"></a>
<FONT color="green">026</FONT>             * @argument arguments an array of {@link Object}s representing<a name="line.26"></a>
<FONT color="green">027</FONT>             *    methods arguments.<a name="line.27"></a>
<FONT color="green">028</FONT>             * @return a string containing the argument list.<a name="line.28"></a>
<FONT color="green">029</FONT>             */<a name="line.29"></a>
<FONT color="green">030</FONT>            public static String argList(Object[] arguments) {<a name="line.30"></a>
<FONT color="green">031</FONT>                    StringBuilder b = new StringBuilder();<a name="line.31"></a>
<FONT color="green">032</FONT>                    if (arguments != null) {<a name="line.32"></a>
<FONT color="green">033</FONT>                            for (Object arg : arguments) {<a name="line.33"></a>
<FONT color="green">034</FONT>                                    if (b.length() &gt; 0) {<a name="line.34"></a>
<FONT color="green">035</FONT>                                            b.append(",");<a name="line.35"></a>
<FONT color="green">036</FONT>                                    }<a name="line.36"></a>
<FONT color="green">037</FONT>                                    if (arg == null) {<a name="line.37"></a>
<FONT color="green">038</FONT>                                            b.append("Object");<a name="line.38"></a>
<FONT color="green">039</FONT>                                    } else {<a name="line.39"></a>
<FONT color="green">040</FONT>                                            b.append(arg.getClass().getName());<a name="line.40"></a>
<FONT color="green">041</FONT>                                    }<a name="line.41"></a>
<FONT color="green">042</FONT>                            }<a name="line.42"></a>
<FONT color="green">043</FONT>                    }<a name="line.43"></a>
<FONT color="green">044</FONT>                    return b.toString();<a name="line.44"></a>
<FONT color="green">045</FONT>            }<a name="line.45"></a>
<FONT color="green">046</FONT>    <a name="line.46"></a>
<FONT color="green">047</FONT>            /**<a name="line.47"></a>
<FONT color="green">048</FONT>             * Produces a print-friendly string with a method signature<a name="line.48"></a>
<FONT color="green">049</FONT>             * (method name and argument types).<a name="line.49"></a>
<FONT color="green">050</FONT>             *<a name="line.50"></a>
<FONT color="green">051</FONT>             * @argument method the method to be printed<a name="line.51"></a>
<FONT color="green">052</FONT>             * @argument arguments an array of {@link Object}s representing<a name="line.52"></a>
<FONT color="green">053</FONT>             *    methods arguments.<a name="line.53"></a>
<FONT color="green">054</FONT>             * @return a string containing the method signature.<a name="line.54"></a>
<FONT color="green">055</FONT>             */<a name="line.55"></a>
<FONT color="green">056</FONT>            public static String methodName(Method method, Object[] arguments) {<a name="line.56"></a>
<FONT color="green">057</FONT>                    return new StringBuilder().append(method.getName()).append("(").append(argList(arguments)).append(")")<a name="line.57"></a>
<FONT color="green">058</FONT>                            .toString();<a name="line.58"></a>
<FONT color="green">059</FONT>            }<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>            /**<a name="line.61"></a>
<FONT color="green">062</FONT>             * Checks if two classes are equivalent; i.e. if the first is assignable<a name="line.62"></a>
<FONT color="green">063</FONT>             * from the other, or if the first is the primitive version (for example int<a name="line.63"></a>
<FONT color="green">064</FONT>             * instead of Integer) of the other.<a name="line.64"></a>
<FONT color="green">065</FONT>             * <a name="line.65"></a>
<FONT color="green">066</FONT>             * @param cl1<a name="line.66"></a>
<FONT color="green">067</FONT>             * @param cl2<a name="line.67"></a>
<FONT color="green">068</FONT>             * @return true if the classes are equivalent<a name="line.68"></a>
<FONT color="green">069</FONT>             * @throws SecurityException<a name="line.69"></a>
<FONT color="green">070</FONT>             * @throws IllegalArgumentException<a name="line.70"></a>
<FONT color="green">071</FONT>             * @throws IllegalAccessException<a name="line.71"></a>
<FONT color="green">072</FONT>             */<a name="line.72"></a>
<FONT color="green">073</FONT>            public static boolean typeIsEquivalent(Class&lt;?&gt; cl1, Class&lt;?&gt; cl2) throws SecurityException,<a name="line.73"></a>
<FONT color="green">074</FONT>                    IllegalArgumentException, IllegalAccessException {<a name="line.74"></a>
<FONT color="green">075</FONT>                    if (!cl1.isPrimitive() &amp;&amp; cl2 == null) {<a name="line.75"></a>
<FONT color="green">076</FONT>                            return true;<a name="line.76"></a>
<FONT color="green">077</FONT>                    }<a name="line.77"></a>
<FONT color="green">078</FONT>                    if (cl1.isAssignableFrom(cl2)) {<a name="line.78"></a>
<FONT color="green">079</FONT>                            return true;<a name="line.79"></a>
<FONT color="green">080</FONT>                    } else if (cl1.isPrimitive()) {<a name="line.80"></a>
<FONT color="green">081</FONT>                            try {<a name="line.81"></a>
<FONT color="green">082</FONT>                                    Field typeField = cl2.getField("TYPE");<a name="line.82"></a>
<FONT color="green">083</FONT>                                    if (cl1.equals(typeField.get(cl2))) {<a name="line.83"></a>
<FONT color="green">084</FONT>                                            return true;<a name="line.84"></a>
<FONT color="green">085</FONT>                                    }<a name="line.85"></a>
<FONT color="green">086</FONT>                            } catch (NoSuchFieldException e) {<a name="line.86"></a>
<FONT color="green">087</FONT>                            }<a name="line.87"></a>
<FONT color="green">088</FONT>                    }<a name="line.88"></a>
<FONT color="green">089</FONT>                    return false;<a name="line.89"></a>
<FONT color="green">090</FONT>            }<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>            /**<a name="line.92"></a>
<FONT color="green">093</FONT>             * Converts an array of method arguments to an array of argument<a name="line.93"></a>
<FONT color="green">094</FONT>             * types by repeatedly calling {@link Object#getClass}.<a name="line.94"></a>
<FONT color="green">095</FONT>             *<a name="line.95"></a>
<FONT color="green">096</FONT>             * @argument arguments an array of {@link Object}s representing<a name="line.96"></a>
<FONT color="green">097</FONT>             *    method arguments. Passing in a null value is okay, and<a name="line.97"></a>
<FONT color="green">098</FONT>             *    returns a zero-element array.<a name="line.98"></a>
<FONT color="green">099</FONT>             * @return an array of {@link Class}es representing the<a name="line.99"></a>
<FONT color="green">100</FONT>             *    corresponding argument types.<a name="line.100"></a>
<FONT color="green">101</FONT>             */<a name="line.101"></a>
<FONT color="green">102</FONT>            public static Class&lt;?&gt;[] argumentTypes(Object[] arguments) {<a name="line.102"></a>
<FONT color="green">103</FONT>                    if (arguments == null) {<a name="line.103"></a>
<FONT color="green">104</FONT>                            return new Class&lt;?&gt;[0];<a name="line.104"></a>
<FONT color="green">105</FONT>                    }<a name="line.105"></a>
<FONT color="green">106</FONT>                    Class&lt;?&gt;[] signature = new Class&lt;?&gt;[arguments.length];<a name="line.106"></a>
<FONT color="green">107</FONT>                    for (int i = 0; i &lt; arguments.length; i++) {<a name="line.107"></a>
<FONT color="green">108</FONT>                            signature[i] = arguments[i] == null ? null : arguments[i].getClass();<a name="line.108"></a>
<FONT color="green">109</FONT>                    }<a name="line.109"></a>
<FONT color="green">110</FONT>                    return signature;<a name="line.110"></a>
<FONT color="green">111</FONT>            }<a name="line.111"></a>
<FONT color="green">112</FONT>    <a name="line.112"></a>
<FONT color="green">113</FONT>            /**<a name="line.113"></a>
<FONT color="green">114</FONT>             * Resolve 'method' to a method in the delegate object.<a name="line.114"></a>
<FONT color="green">115</FONT>             * <a name="line.115"></a>
<FONT color="green">116</FONT>             * @throws NoSuchMethodException<a name="line.116"></a>
<FONT color="green">117</FONT>             *    if a suitable method can not be found.<a name="line.117"></a>
<FONT color="green">118</FONT>             */<a name="line.118"></a>
<FONT color="green">119</FONT>            public static Method resolveMethod(Method method, Class&lt;?&gt;[] signature, Object delegate)<a name="line.119"></a>
<FONT color="green">120</FONT>                    throws NoSuchMethodException, SecurityException, IllegalArgumentException, IllegalAccessException {<a name="line.120"></a>
<FONT color="green">121</FONT>                    String name = method.getName();<a name="line.121"></a>
<FONT color="green">122</FONT>                    Class&lt;?&gt; returnType = method.getReturnType();<a name="line.122"></a>
<FONT color="green">123</FONT>                    if (delegate != null) {<a name="line.123"></a>
<FONT color="green">124</FONT>                            Method[] methods = delegate.getClass().getDeclaredMethods();<a name="line.124"></a>
<FONT color="green">125</FONT>                            for (Method m : methods) {<a name="line.125"></a>
<FONT color="green">126</FONT>                                    if (name.equals(m.getName()) &amp;&amp; m.getReturnType().equals(returnType)<a name="line.126"></a>
<FONT color="green">127</FONT>                                                    &amp;&amp; Arrays.equals(signature, m.getParameterTypes())) {<a name="line.127"></a>
<FONT color="green">128</FONT>                                            return m;<a name="line.128"></a>
<FONT color="green">129</FONT>                                    }<a name="line.129"></a>
<FONT color="green">130</FONT>                            }<a name="line.130"></a>
<FONT color="green">131</FONT>                            for (Method m : methods) {<a name="line.131"></a>
<FONT color="green">132</FONT>                                    if (name.equals(m.getName()) &amp;&amp; m.getReturnType().equals(returnType)) {<a name="line.132"></a>
<FONT color="green">133</FONT>                                            Class&lt;?&gt;[] parameterTypes = m.getParameterTypes();<a name="line.133"></a>
<FONT color="green">134</FONT>                                            if (parameterTypes.length == signature.length) {<a name="line.134"></a>
<FONT color="green">135</FONT>                                                    boolean found = true;<a name="line.135"></a>
<FONT color="green">136</FONT>                                                    for (int j = 0; j &lt; parameterTypes.length; j++) {<a name="line.136"></a>
<FONT color="green">137</FONT>                                                            if (!typeIsEquivalent(parameterTypes[j], signature[j])) {<a name="line.137"></a>
<FONT color="green">138</FONT>                                                                    found = false;<a name="line.138"></a>
<FONT color="green">139</FONT>                                                                    break;<a name="line.139"></a>
<FONT color="green">140</FONT>                                                            }<a name="line.140"></a>
<FONT color="green">141</FONT>                                                    }<a name="line.141"></a>
<FONT color="green">142</FONT>                                                    if (found) {<a name="line.142"></a>
<FONT color="green">143</FONT>                                                            return m;<a name="line.143"></a>
<FONT color="green">144</FONT>                                                    }<a name="line.144"></a>
<FONT color="green">145</FONT>                                            }<a name="line.145"></a>
<FONT color="green">146</FONT>                                    }<a name="line.146"></a>
<FONT color="green">147</FONT>                            }<a name="line.147"></a>
<FONT color="green">148</FONT>                    }<a name="line.148"></a>
<FONT color="green">149</FONT>                    for(Method m: Object.class.getDeclaredMethods()) {<a name="line.149"></a>
<FONT color="green">150</FONT>                            if (name.equals(m.getName()) &amp;&amp; m.getReturnType().equals(returnType)<a name="line.150"></a>
<FONT color="green">151</FONT>                                            &amp;&amp; Arrays.equals(signature, m.getParameterTypes())) {<a name="line.151"></a>
<FONT color="green">152</FONT>                                    return m;<a name="line.152"></a>
<FONT color="green">153</FONT>                            }<a name="line.153"></a>
<FONT color="green">154</FONT>                    }<a name="line.154"></a>
<FONT color="green">155</FONT>                    throw new NoSuchMethodException();<a name="line.155"></a>
<FONT color="green">156</FONT>            }<a name="line.156"></a>
<FONT color="green">157</FONT>    <a name="line.157"></a>
<FONT color="green">158</FONT>            /**<a name="line.158"></a>
<FONT color="green">159</FONT>             * Resolve 'method' to a method in the delegate object.<a name="line.159"></a>
<FONT color="green">160</FONT>             * <a name="line.160"></a>
<FONT color="green">161</FONT>             * @throws NoSuchMethodException<a name="line.161"></a>
<FONT color="green">162</FONT>             *             if a suitable method can not be found.<a name="line.162"></a>
<FONT color="green">163</FONT>             */<a name="line.163"></a>
<FONT color="green">164</FONT>            public static Method resolveMethod(Method method, Object[] arguments, Object delegate)<a name="line.164"></a>
<FONT color="green">165</FONT>                    throws NoSuchMethodException, SecurityException, IllegalArgumentException, IllegalAccessException {<a name="line.165"></a>
<FONT color="green">166</FONT>                    return MethodUtil.resolveMethod(method, argumentTypes(arguments), delegate);<a name="line.166"></a>
<FONT color="green">167</FONT>            }<a name="line.167"></a>
<FONT color="green">168</FONT>    <a name="line.168"></a>
<FONT color="green">169</FONT>            public static Field resolveProperty(Method method, Class&lt;?&gt;[] signature, Object delegate)<a name="line.169"></a>
<FONT color="green">170</FONT>                    throws NoSuchFieldException {<a name="line.170"></a>
<FONT color="green">171</FONT>                    if ((!isGetter(method, signature)) &amp;&amp; (!isSetter(method, signature))) {<a name="line.171"></a>
<FONT color="green">172</FONT>                            throw new NoSuchFieldException();<a name="line.172"></a>
<FONT color="green">173</FONT>                    }<a name="line.173"></a>
<FONT color="green">174</FONT>                    Matcher m = PROPERTY.matcher(method.getName());<a name="line.174"></a>
<FONT color="green">175</FONT>                    if (m.matches()) {<a name="line.175"></a>
<FONT color="green">176</FONT>                            String n = m.group(2);<a name="line.176"></a>
<FONT color="green">177</FONT>                            return delegate.getClass().getDeclaredField(n.substring(0, 1).toLowerCase() + n.substring(1));<a name="line.177"></a>
<FONT color="green">178</FONT>                    }<a name="line.178"></a>
<FONT color="green">179</FONT>                    throw new NoSuchFieldException();<a name="line.179"></a>
<FONT color="green">180</FONT>            }<a name="line.180"></a>
<FONT color="green">181</FONT>    <a name="line.181"></a>
<FONT color="green">182</FONT>            public static Field resolveProperty(Method method, Object[] arguments, Object delegate) throws NoSuchFieldException {<a name="line.182"></a>
<FONT color="green">183</FONT>                    return resolveProperty(method, argumentTypes(arguments), delegate);<a name="line.183"></a>
<FONT color="green">184</FONT>            }<a name="line.184"></a>
<FONT color="green">185</FONT>    <a name="line.185"></a>
<FONT color="green">186</FONT>            /**<a name="line.186"></a>
<FONT color="green">187</FONT>             * Determines if a given method is a property getter by looking at<a name="line.187"></a>
<FONT color="green">188</FONT>             * the method name and arguments.<a name="line.188"></a>
<FONT color="green">189</FONT>             *<a name="line.189"></a>
<FONT color="green">190</FONT>             * @return true if the argument list is empty, the name starts<a name="line.190"></a>
<FONT color="green">191</FONT>             *    with either 'is' or 'get' followed by a capital letter and<a name="line.191"></a>
<FONT color="green">192</FONT>             *    has a return type other than void.<a name="line.192"></a>
<FONT color="green">193</FONT>             */<a name="line.193"></a>
<FONT color="green">194</FONT>            public static boolean isGetter(Method method, Object[] signature) {<a name="line.194"></a>
<FONT color="green">195</FONT>                    if ((signature != null &amp;&amp; signature.length &gt; 0) || Void.TYPE.equals(method.getReturnType())) {<a name="line.195"></a>
<FONT color="green">196</FONT>                            return false;<a name="line.196"></a>
<FONT color="green">197</FONT>                    }<a name="line.197"></a>
<FONT color="green">198</FONT>                    return GETTER.matcher(method.getName()).matches();<a name="line.198"></a>
<FONT color="green">199</FONT>            }<a name="line.199"></a>
<FONT color="green">200</FONT>    <a name="line.200"></a>
<FONT color="green">201</FONT>            /**<a name="line.201"></a>
<FONT color="green">202</FONT>             * Determines if a given method is a property setter by looking at<a name="line.202"></a>
<FONT color="green">203</FONT>             * the method name and arguments.<a name="line.203"></a>
<FONT color="green">204</FONT>             * <a name="line.204"></a>
<FONT color="green">205</FONT>             * @return true if the argument list contains exactly one element,<a name="line.205"></a>
<FONT color="green">206</FONT>             *    name starts with 'set' followed by a capital letter and the<a name="line.206"></a>
<FONT color="green">207</FONT>             *    return type is void.<a name="line.207"></a>
<FONT color="green">208</FONT>             */<a name="line.208"></a>
<FONT color="green">209</FONT>            public static boolean isSetter(Method method, Object[] signature) {<a name="line.209"></a>
<FONT color="green">210</FONT>                    if (signature == null || signature.length != 1 || !Void.TYPE.equals(method.getReturnType())) {<a name="line.210"></a>
<FONT color="green">211</FONT>                            return false;<a name="line.211"></a>
<FONT color="green">212</FONT>                    }<a name="line.212"></a>
<FONT color="green">213</FONT>                    return SETTER.matcher(method.getName()).matches();<a name="line.213"></a>
<FONT color="green">214</FONT>            }<a name="line.214"></a>
<FONT color="green">215</FONT>    <a name="line.215"></a>
<FONT color="green">216</FONT>            /**<a name="line.216"></a>
<FONT color="green">217</FONT>             * Takes a {@link Throwable} and converts it to a {@link<a name="line.217"></a>
<FONT color="green">218</FONT>             * RuntimeException} by doing some creative wrapping and unwrapping.<a name="line.218"></a>
<FONT color="green">219</FONT>             * &lt;ol&gt;<a name="line.219"></a>
<FONT color="green">220</FONT>             * &lt;li&gt;If the root cause of the Throwable is a RuntimeException, return that.&lt;/li&gt;<a name="line.220"></a>
<FONT color="green">221</FONT>             * &lt;li&gt;If the Throwable is itself a RuntimeException, then return that instead.&lt;/li&gt;<a name="line.221"></a>
<FONT color="green">222</FONT>             * &lt;li&gt;Otherwise, wrap the Throwable in a new RuntimeException and return that.&lt;/li&gt;<a name="line.222"></a>
<FONT color="green">223</FONT>             * &lt;/ol&gt;<a name="line.223"></a>
<FONT color="green">224</FONT>             */<a name="line.224"></a>
<FONT color="green">225</FONT>            public static RuntimeException toRuntimeException(Throwable t) {<a name="line.225"></a>
<FONT color="green">226</FONT>                    Throwable c = t.getCause();<a name="line.226"></a>
<FONT color="green">227</FONT>                    if (c != null &amp;&amp; c instanceof RuntimeException) {<a name="line.227"></a>
<FONT color="green">228</FONT>                        throw (RuntimeException) c;<a name="line.228"></a>
<FONT color="green">229</FONT>                    }<a name="line.229"></a>
<FONT color="green">230</FONT>                    if (t instanceof RuntimeException) {<a name="line.230"></a>
<FONT color="green">231</FONT>                        throw (RuntimeException) t;<a name="line.231"></a>
<FONT color="green">232</FONT>                    }<a name="line.232"></a>
<FONT color="green">233</FONT>                    throw new RuntimeException(t);<a name="line.233"></a>
<FONT color="green">234</FONT>            }<a name="line.234"></a>
<FONT color="green">235</FONT>    }<a name="line.235"></a>




























































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